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US 6,285,170 B1Granted
Switching power supply
AssigneeNagano Japan Radio Co., Ltd.
InventorsAkira Matsumoto, Hiroshi Yamazaki
Life of this patent
Estimating the term…
Abstract
A switching power supply comprises a boost converter, a smoothing capacitor for smoothing an output voltage from the boost converter, and inrush current-limiting means for limiting an inrush current flowing into the smoothing capacitor. The inrush current-limiting means is connected between the boost converter and the smoothing capacitor.
Claims6
A switching power supply comprising a boost converter, a smoothing capacitor that smooths an output voltage from said boost converter, and inrush current-limiting device that limits an inrush current flowing into said smoothing capacitor,
- wherein said inrush current-limiting device is connected between said boost converter and said smoothing capacitor,
- said switching power supply further comprising a switch circuit connected in parallel with said inrush current-limiting device and operating when an input voltage of said boost converter is lower than a charging voltage of said smoothing capacitor, to permit said output voltage from said boost converter to be output to said smoothing capacitor.
Dependencies are inferred from the claim text.